Baffled voters are switching between all of the main parties or giving up on the election altogether, pollsters have warned...

Gideon Skinner, from IpsosMori, said: "Swing is a very useful concept, but never forget that it is now a misleadingly simple name for a very complex business. Most of the shift in votes these days is unlikely to involve many people who voted Conservative five years ago now having decided to vote Labour instead.

‘Today, most of the movement is between the two big parties and the smaller parties, of 2010 voters thinking they will not turn out this time (or vice versa), or people moving between the smaller parties. Rather than thinking of a swing, it is probably more useful to picture a roundabout - or as an overlapping flow of voters between multiple parties, as we show here."